RE: Understanding: IPv6 Tunneling Modes

Thanks Narbik, great explanation.

The question that I was not able to understand - Which tunneling method to use
which is specifically designed for
transporting different Layer 3 protocols?

I think it should be "tunnel mode gre ipv6". But, not sure.. Your thought?

> Date: Mon, 10 Aug 2009 21:11:13 -0700
> Subject: Re: Understanding: IPv6 Tunneling Modes
> From: narbikk_at_gmail.com
> To: juecker_at_ccbootcamp.com
> CC: ebay_products_at_hotmail.com; ccielab_at_groupstudy.com
>
> *There are 5 tunneling solution in IPv6:*
>
>
>
> *1. Using the "Tunnel mode ipv6ip", in this case the tunnel source and
> destination are configured with IPv4 addressing and the tunnel interface is
> configured with IPv6. This will use protocol 41. This is used for
IPv6/IPv4.
> *
>
>
>
> R1(config)#int tunnel 1
>
> R1(config-if)#ipv6 address 12:1:12::1/64
>
> R1(config-if)#tunnel source 10.1.12.1
>
> R1(config-if)#tunnel destination 10.1.12.2
>
> R1(config-if)#*tunnel mode ipv6ip*
>
>
>
> *2. Using the "Tunnel mode gre ipv6", in this case the tunnel source and
> destination are all configured with IPv6 addressing. This is used for
> IPv6/IPv6. *
>
>
>
> BB1(config)#int tunnel 1
>
> BB1(config-if)#ipv6 address 121:1:121::111/64
>
> BB1(config-if)#tunnel source 10:1:111::111
>
> BB1(config-if)#tunnel destination 10:1:112::112
>
> BB1(config-if)#*tunnel mode gre ipv6*
>
>
>
> *3. In this case, the third type, the tunnel mode is NOT used at all, note
> that the tunnel interface is configured with IPv6 and the tunnel source and
> destination is configured with IPv4 but no mention of tunnel mode. This
> configuration will use protocol 47. This is used for IPv6/IPv4. *
>
>
>
> R1(config)#int tunnel 13
>
> R1(config-if)#ipv6 address 13:1:13::1/64
>
> R1(config-if)#tunnel source 10.1.13.1
>
> R1(config-if)#tunnel destination 10.1.13.3
>
>
>
> *4. Note in this case a special addressing is assigned to the tunnel
> interface which is a concatenation of a reserved IPv6 address of
> 2002followed by the translated
> IPv4 address of a given interface on the router. In this configuration ONLY
> the tunnel source address is used and since the tunnel is automatic,
> the destination
> address is NOT configured. The tunnel mode is set to "Tunnel mode ipv6ip
> 6to4". Note the IPv4 address of 10.1.1.1 is translated to 0A.01.01.01 and
> once concatenated, it will be "2002:0A01:0101: or 2002:A01:101. This is
used
> for IPv6/IPv4.*
>
>
>
> R1(config)#interface Tunnel14
>
> R1(config-if)#ipv6 address 2002:A01:101::/128
>
> R1(config-if)#tunnel source 10.1.1.1
>
> R1(config-if)#*tunnel mode ipv6ip 6to4*
>
>
>
> *5. ISATAP, ISATAP works like 6to4 tunnels, with one major difference, it
> uses a special IPv6 address which is formed as follows: *
>
> *In this tunnel mode, the network portion can be any IPv6 address, whereas
> in 6to4 it had to start with 2002.*
>
> *Note when the IPv6 address is assigned to the tunnel interface, the
> "eui-64" is used, in this case the host portion of the IPv6 address starts
> with "0000.5EFE" and then the rest of the host portion is the translated
> IPv4 address of the tunnel's source IPv4 address. This translation is
> performed automatically unlike 6to4. This is used for IPv6/IPv4.*
>
>
>
> R4(config)#int tunnel 46
>
> R4(config-if)#ipv6 address 46:1:46::/64 eui-64
>
> R4(config-if)#tunnel source 10.44.44.44
>
> R4(config-if)#*tunnel mode ipv6ip ISATAP*
>
>
> On Mon, Aug 10, 2009 at 8:57 PM, Jacob Uecker
<juecker_at_ccbootcamp.com>wrote:
>
> > You're not alone! I had trouble with this in my studies as well. What
> > made
> > things more clear for me was actually labbing them up. There's nothing
> > like
> > actually seeing what works in different situations and what doesn't. If
you
> > need some more specific help, just ask. I'd also be happy to help
off-list
> > if
> > you'd prefer.
> >
> > Thanks,
> >
> > Jacob Uecker
> > CCIE# 24481
> >
> > Development Engineer
> > CCBOOTCAMP - Cisco Learning Partner (CLP)
> > Toll Free: 877-654-2243
> > International: +1-702-968-5100
> > Skype: skype:ccbootcamp?call
> > FAX: +1-702-446-8012
> >
> > YES! We take Cisco Learning Credits!
> >
> > Training And Remote Racks: http://www.ccbootcamp.com
> >
> > ________________________________
> >
> > From: nobody_at_groupstudy.com on behalf of Cisco Fanatic
> > Sent: Mon 8/10/2009 1:35 PM
> > To: ccielab_at_groupstudy.com
> > Subject: Understanding: IPv6 Tunneling Modes
> >
> >
> >
> > I am working on IPv6 technologies now. My head is hurting .. I
understand,
> > but
> > still get confused with the wordings as what tunneling mode to use over
the
> > other.
> >
> > Can someone help me understand all the IPv6 tunneling modes in a
snapshot.
> >
> > Thanks,
> > Yuri
> >
> >
> >
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>
>
> --
> Narbik Kocharians
> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
> www.MicronicsTraining.com
> Sr. Technical Instructor
>
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Received on Tue Aug 11 2009 - 11:00:04 ART